Buffing and polishing machine



Jan. 23, 1940. c. o. JOHNSON BUFFING AND POLISHING MACHINE Filed Sept. 30, 1937 3 Sheets-Sheet 1 C- agkhzzsoh/ Jan. 23, 1940' c. o. JGHNSON BUFFING AND POLISHING MACHINE Filed Sept. 30, 1937 3 Sheets-Sheet 2 3mm C, 0; Jahflson Patented Jan. 23, 1940 PATENT OFFICE BUFFING AND POLISHING MACHINE Carl 0. Johnson, Springville, N. Y., assignor to Ralph B. Waite, Springville, N. Y.

Application September 30, 1937, Serial No. 166,691

Claims.

This invention relates to certain new and useful improvements in buffing or polishing machinesyand has particular reference to the type of machinedisclosed in the application for pat- 5- ent filed by Carl 0. Johnson for Buffing or polishing machines on May 27, 1936, Serial Number 82,103 and embodies improvements in the art thereover.

In the bufling and polishing machine disclosed in the application of Carl O. Johnson, a frame structure supports a pair of cooperating slides, one of the slides being mounted on the frame structure to reciprocate through the medium of guides in directions at right angles to the longitudinal axes of bufiing or polishing rolls while the other slide is directly mounted upon the first named slide to reciprocate in a direct line parallel to the longitudinal axes of the rolls.

An object of the present invention is to change the direction of movement of the second slide with reference to the first slide, the latter being mounted for reciprocatory movements in directions at right angles to the longitudinal axes of the bufling or polishing rolls while the second slide is resiliently supported relative to the first slide and is caused to move in oscillatory swinging arcuate paths relative to the first named slide for presenting the articles to be buffed or polished to the bufiing or polishing rolls in a man- 0- ner different from the disclosure in the aforesaid Johnson application and with the idea of improving the bufii'ng or polishing operation.

With the above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings:

Figure 1 is a top plan View of the buiiing or polishing machine constructed in accordance with the present invention;

Figure 2 is a front elevational view showing the upper and lower polishing rolls, the separate motor drive for each roll and the devices for operating the slides and swinging holder;

Figure 3 is a fragmentary top plan view showing the reciprocating slide that moves toward and away from the polishing rolls and the resili- .55 Figure 4 is a fragmentary side elevational View,

partly broken away of the mechanism shown in Figure 3; and

Figure 5 is a detail sectional View taken on line 5-5 of Figure 3, showing the gear drive and eccentric disk for imparting swinging movement 5 to the resilient arms that carry the holder.

The machine as shown in Figs. 1 and 2 of the drawings is comparable with the disclosure in the application of Carl 0. Johnson hereinbefore mentioned and in general comprises a table In 10 supported on standards II and from which table in an upright bearing l2 rises from each end.

As shown in Fig. 1, a rock shaft I3 is journalled in the upper ends of the uprights l2 and said rock shaft carries a pair of rock arms Hi shown in Fig. 5 2 that rotatably support at their free ends a polishing roller l5, the shaft N5 of the roller l5 being a part of or connected to the shaft of the electric motor IT. A pair of rock arms l8 are supported on a rock shaft 19 in the upright I2 below the 20 rocker shaft l3 and rotatably support at their free ends the polishing roller 20', the shaft 2| of which forms a partof or is connected to the shaft of the electric motor 22. The arms l4 and I8 at their points of connection with the rock 5 shafts l6 and I9 are geared together as at 23 to cause simultaneous movement of the polishing rolls I5 and 26 toward and away from each other when the same are adjusted by means of the adjusting screw 24 threading through blocks carried 3Q. by the free ends of a pair of arms l4 and is at one end of the machine opposite the geared connections 23 between the arms at the opposite end of the machine.

As shown more clearly in Fig. 2, a pair of guide 352 rails 25 is carried by the upper side of the table top H) and extend in direction at right angles to the longitudinal axes of the polishing rollers l5 and 20. A slide plate 26 has the opposite side edges 21 slidably and interlockingly engaged with 40 the guides 25 and is movable over said guides in a direction at right angles to the longitudinal axes of the polishing rollers I5 and 2D.

The devices for effecting reciprocatory movements of the slide plate 26 include in general a 45 fluid cylinder 28 secured to and depending from the table top [0 with a piston 29 projecting from one end of the cylinder 28 engaged with an arm 30 at a point forwardly of the front edge of the table top ID with the arm 30 extending upwardly for 50 attachment to the underside of the slide plate 26. The devices for effecting reciprocation of the piston rod 29 within the fluid cylinder 28 broadly include a pump'3l shown in Figure 1 as having a belt and pulley connection 32 with the shaft 2| of the electric motor 22, the pump 3| drawing fluid from the tank 33 in a standard H by way of the pipe 34 and feeding the fluid under pressure by way of the pipe 35' to a multi-way valve 36. Pipes 37 from the multi-way valve 36 deliver the fluid to the fluid cylinder 28 to effect reciprocation of the piston 29 and reciprocatory movements of the slide plate 26, the fluid in the cylinder 28 bleeding through the pipe lines 31' through the multi-way valve 36 and being returned by way of the pipe 38 to the fluid tank 33. If desired, the fluid flowing through the pipe 35 from the pump 36 may be returned or .by-passed to the tank 33 before delivery to the multiplevalve 36 by way of the valve device 39 controlled by the operating lever 49 as shown in Figs. 1 and 2.

The stem 4| of the multi-way valve 36 shown in- Fig. 2 as rising from said Valve 36 has devices associated therewith that are operated by movements of the slide plate 26 for the automatic operation of the multi-way valve to efiect reciprocations of the piston 29 in the fluid cylinder 23 and as shown in Fig. 1, a rod 92 is mounted in bearings 43 and M projecting from one side'edge of the slide plate 26, the rod 52 being threaded as at 45 for threading through the bearing block 44 and adjusted by means of the operating handle 46. An arm 41 has one end thereof fixed to the upper end of the stem 4| of the multi-way valve 36 and the free end of the arm 4'! has a pin and slot connection 48 with a second arm or lever 99 that is pivotally supported as at V!] to the adjacent side of a slide plate 26. A pair of stop blocks 5|, one of which is shown in Fig. 1,

is adjustably attached to the rod 52 by means of a pin 52 for anchoring the stop block 5| in selected openings 53 in said rod and during reciprocatory movement of the slide plate 26, the stop or abutment blocks 5| engage the'lever 49 to move the same on its pivotal mounting 56 and also shift the arm 42 for reversing the position of the multi-way valve 36. Means is provided for holding the multi-way valve in its adjusted position for the feeding of fluid to either end of the fluid cylinder 28 and includes a coil spring 54 having one end attached to the pin and slot connection 48 between'the arms 9'! and 49 while the other end of the spring is anchored as at 55 to the slide plate 26, the spring being of the coiled type and tensioned intermediate its ends thereof by being stretched and selectively engaged with notches 56 in an angle plate 51 rising from the slide plate 26. The structure described in connection with the reciprocation of the slide plate 26 is substantially identical with the showing in the aforementioned Johnson application.

A resiliently mounted work holder that causes the work holder to swing in an oscillatory arcuate path is carried by the reciprocating slide plate 26 and as shown in Fig. 1, the rear end of the slide plate 26 carries integral laterally projecting plate portions 58 to which a pair of resilient blade-like arms 59 and 60 are attached at their rear ends and are substantially co-extensive with the length of the slide plate 26. In lieu of the plate extension 58 on the slide plate 26, it is also intended to provide a pair of rigid bracket arms 58a as shown in Fig. 3 for attaching the resilient side arms 59 and 69 to the rear end of the slide plate 26. In each instance, the resilient blade-like arms 59 and 66 are anchored at their rear ends with the forward or other ends of the resilient arms freely disposed for attachment to upright work holders 6|, the forward ends of the resilient side arms 59 and 60 being connected together by a cross-rod 62 and a tie rod 63. Clamp devices 64 as shown in Figures 1 and 3am carried by the upright work holders andinclude bars 71 having pin supports for knife blades 18 or other articles to be polished or buffed.

The devices for effecting oscillatory swinging movements of the free ends of the resilient side arms 59 and 69 and the upright work support 6| include a worm shaft 65 shown in Fig. 2 as having a belt and pulley connection 66 with the shaft of the electric motor H, the worm shaft 65 having a suitable bearing in a standard table top W or other support and said worm shaft 65 as shown in Fig. 5 has a worm 61 that meshes with the worm wheel 68 secured to the lower end of a shaft 69 that is journalled in a bearing extending above the table top ID. The upper end of the shaft 69 carries an eccentrically disposed end projecting pin 1| upon which a roller bearing 12 is freely rotatable, and said roller bearing 12 is disposed for contact or engagement with the inner side of the resilient side arm 59 as shown in Figs. 2 to 4. To maintain constant engagement between the roller bearing 12 and the resilient side arm 59, a collar 73 is fixed to the tie rod 63 intermediate its ends and in spaced relation to a housing 76 through which the tie rod 63 freely extends, an expansion spring being positioned between the collar 13 and housing 14 for normally influencing the tie rod 63 in a direction for holding the resilient side arm 59 engaged with the roller bearing 12.

From the above detailed description of the invention, it is believed that the construction and operation thereof will at once be apparent, it being noted that the fluid means effects reciprocation of the slide plate 26, the motors I! and 22 rotating the polishing or bufling rollers l5 and 26 while rotation of the roller bearing 12 effects a substantial pivotal movement of the side arms 59 and 66 on their points of attachment to the slide plate 26 with the free ends of the resilient side arms 59 and 66 that carry the work holder moving through oscillatory swinging arcs of movement, the articles held by the work holder being moved toward and away from the bufing rollers and into and out of the bight between the rollers, the articles being buffed moving in orbital paths with the result that excess buffing or polishing will not be concentrated at any particular point so that the article to be buffed will be similarly treated over the entire area thereof. A distinctive feature of the invention includes the reciprocating slide plate 26 with the resilient blade-like arms anchored at one end to the rear end of the slide plate with the free ends of the arms that carry the work holder swinging in oscillatory arcuate paths.

I claim:

1. In a polishing and bufiing machine, a pair of bufling and polishing rolls, means to drive the rolls, a slide member movable towards and away from the rolls in a line at right angles to the longitudinal axes of the rolls, a pair of resilient arms anchored at one end to the slide member, a work holder carried by the other end of the resilient arms and means for moving the arms against resiliency thereof to cause the work holder to oscillate through arcuate paths, traversing the path of movement of the slide member.

2. In a polishing and buffing machine, a pair of buffing and polishing rolls, means to drive the rolls, a slide member movable towards and away from the rollsin aline at right angles 75;

to the longitudinal axes of the rolls, a pair of resilient arms anchored at one end to the slide member, a work holder carried by the other ends of the resilient arms and a cam element engageable with one of the arms for moving the arms against resiliency thereof to cause the work holder to oscillate through arcuate paths traversing the path of movement of the slide member.

3. In a polishing and bufiing mechine, a pair of bufiing and polishing rolls, means to drive the rolls, a slide member movable towards and away from the rolls in a line at right angles to the longitudinal axes of the rolls, a pair of resilient arms anchored at one end to the slide member, a work holder carried by the other ends of the resilient arms and a cam element engageable with one of the arms for moving the arms against resiliency thereof to cause the work holder to oscillate through arcuate paths'traversing the path of movement of the slide member, and means for maintaining the engagement between the cam element and associated resilient arm.

4. In a polishing and buffing machine, a pair of buffing and polishing rolls, means to drive the rolls, a slide member movable towards and away from the rolls in a line at right angles to the longitudinal axes of the rolls, a pair of resilient arms anchored at one end to the'slide member, a work holder carried by the other ends of the resilient arms and a cam element engageable with one of the arms for moving the arms against resiliency thereof to cause the work holder to oscillate through arcuate paths traversing the. path of movement of the slide member, and operative connections between the driving means for a roll and said cam element,

' 5. In a polishing and buffing machine, a pair of buifing and polishing rolls, means to drive the rolls, a slide member movable towards and away from the rolls in a line at right angles tothe longitudinal axes of the rolls, a pair of resilient arms anchored at one end to the slide member, a Work holder carried by the other ends of the resilient arms and a cam element engageable with one of the arms for moving the arms against resiliency thereof to cause the work holder to oscillate through arcuate paths traversing the path of movement of the slide member, and means for maintaining the engagement between the cam element and associated resilient arm, and operative connections between the driving means for a roll and said cam element.

C. O. JOHNSON. 

